package com.xizi.arraylist;

import java.util.UUID;
import java.util.concurrent.CopyOnWriteArrayList;

public class ArrayListNotSafeDemo {
    public static void main(String[] args) {

//        List<String> list = new ArrayList<>();
//        Vector<String> list = new Vector<>();
//        List<String> list = Collections.synchronizedList(new ArrayList<>());
        CopyOnWriteArrayList<String> list = new CopyOnWriteArrayList<>();

//        for (int i = 0; i < 30; i++) {
//            new Thread(() -> {
        list.add(UUID.randomUUID().toString().substring(0, 8));
//                System.out.println(list);
//            }, String.valueOf(i)).start();
//        }
    }
}